A planter 1 comprises an enclosure providing a main cultivation surface P at its upper end, and subsidiary cultivation surfaces 51, 52 constituted by horizontal upwardly facing openings defined between the respective upper edges of outwardly and upwardly inclined wall panels and the lower edges of vertically adjacent inclined wall panels. The planter may be of modular construction, comprising a vertical coaxial array of downwardly tapering tubular elements 3, 13, of polygonal or circular cross-section. Struts or beams may be arranged between the elements to support the elements in the required relationship. Alternatively side panels of the planter may have channels to receive edges of a rear panel and of inclined front panels arranged one above another.
